[issue39742] Enhancement: add `os.getdtablesize(..)` to `os` (`posix`) module

[Terry J. Reedy]

Change by Terry J. Reedy :


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nosy: +larry

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[issue39742] Enhancement: add `os.getdtablesize(..)` to `os` (`posix`) module

[Enji Cooper]

Change by Enji Cooper :


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versions: +Python 3.9

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[issue39742] Enhancement: add `os.getdtablesize(..)` to `os` (`posix`) module

[Enji Cooper]

New submission from Enji Cooper :

getdtablesize({2,3}) is a wonderful library call/system call to have access to 
because it allows one to determine the descriptor limits at runtime in an 
easier manner than having to do the equivalent with os.sysconf(..):

>>> os.sysconf(os.sysconf_names["SC_OPEN_MAX"])

This has been present in *BSD since time memorial [1] and in Linux since 2010 
[2], so I think it would be a good addition to the `os` (`posix`) module.

I will submit a diff for this in a few days, if it's deemed acceptable to have 
in the `posix` module.

1. 
https://www.freebsd.org/cgi/man.cgi?query=getdtablesize=2=freebsd-release-ports
2. http://man7.org/linux/man-pages/man2/getdtablesize.2.html

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components: Library (Lib)
messages: 362603
nosy: ngie
priority: normal
severity: normal
status: open
title: Enhancement: add `os.getdtablesize(..)` to `os` (`posix`) module
type: enhancement

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